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Advent calendar 2015
8 December
All 2015 advent puzzles
~
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What is the largest number of factors which a number less than a million has?
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720720 has 240 factors.
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Most recent collections
Advent calendar 2024
Advent calendar 2023
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List of all puzzles
Tags
cards
fractions
rugby
planes
shapes
axes
cubics
chess
multiples
people maths
digital clocks
combinatorics
triangle numbers
number
mean
ave
geometric mean
addition
clocks
digital products
averages
spheres
calculus
percentages
matrices
coordinates
pentagons
dates
sequences
neighbours
partitions
irreducible numbers
2d shapes
advent
ellipses
doubling
integration
binary
median
factorials
dice
tiling
square grids
means
complex numbers
sets
hexagons
cube numbers
cryptic crossnumbers
circles
dodecagons
routes
area
palindromes
taxicab geometry
symmetry
polygons
factors
elections
products
games
odd numbers
sums
sport
3d shapes
logic
albgebra
perfect numbers
digits
folding tube maps
remainders
bases
probability
polynomials
decahedra
indices
differentiation
algebra
angles
trigonometry
colouring
square numbers
balancing
powers
quadrilaterals
volume
arrows
triangles
graphs
medians
books
money
determinants
integers
star numbers
range
the only crossnumber
probabilty
time
tangents
crossnumbers
geometry
parabolas
scales
functions
unit fractions
consecutive numbers
proportion
expansions
chalkdust crossnumber
square roots
menace
pascal's triangle
quadratics
numbers grids
lines
consecutive integers
division
even numbers
surds
gerrymandering
numbers
chocolate
coins
floors
geometric means
wordplay
multiplication
prime numbers
tournaments
squares
grids
christmas
perimeter
shape
cryptic clues
crosswords
sum to infinity
dominos
rectangles
regular shapes
speed
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